[TargetLowering] use APInt::getLowBitsSet instead of APInt::getAllOnes+zext. (#188384)

2026-03-25 09:09:04 -07:00 · 2026-03-25 09:09:04 -07:00 · d362bd7b9d
commit d362bd7b9d
parent 18250fd47b
1 changed files with 1 additions and 1 deletions
--- a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
@ -7428,7 +7428,7 @@ TargetLowering::prepareSREMEqFold(EVT SETCCVT, SDValue REMNode,
      // A = 2^(W-1)
      A = APInt::getSignedMinValue(W);
      // - Q = 2^(W-K) - 1
-      Q = APInt::getAllOnes(W - K).zext(W);
+      Q = APInt::getLowBitsSet(W, W - K);
    }

    // If the divisor is 1 the result can be constant-folded. Likewise, we